Machine for raising pavement



Aug. 7, 1934. J. w. POUL TER 1,969,324 MACHINE FOR RAIsII cT PAVEMENT I F iled June 4 1931 3 Sheets-Sheet 1 W W. Pol/ Aug. 7, 1934. J. w. POULTER 1,969,324

MACHINE FOR R AISING PAVEMENT Filed June 4, 1931 3 Sheets-Sheet 2 Aug. 7,' 1934. J. w. POULTER 1,959,324

I MACHINEFOR RAISING PAVEMENT Filed June 4. 1931 3 Sheets-Sheet 3 gwuwntop fol/1v W. P001. 75R.

I is. 5- w,

54.) the, pavement through the holes Patented Aug. 7, 1934 ohn W.

Poulter, Milwaukee, Wis., assignor to National Equipment Corporation, Milwaukee, Wls., a corporation of Delaware Application June 4, 1931, Serial No. 542,153 '1 Claims. (01. 61-63) This invention relates to a combined mixing and pumping apparatus which is especially de, signed for carrying out the process described in my Letters Patent No. 1,929,215, issued October 3, 1933 for process of treating sunken pavements.

The apparatus is particularly adapted to building up of pressures behind or on one side of various structures suchas masonry slabs,

including brick and concrete pavements, walls,

fioo'rs, and the like, which have become misaligned or have shifted from their original positions, for the purpose of moving-the same back to the original position or to a new position by means of hydrostatic pressure. The machine may be also used to raise any structure which has settled due to settlement of the ground about its foundation. f

One of the largest fields of use of 'the apparatus lies in hard surface road construction and maintenance where portions of the paved roadway have become sunken due to settlement of v the subgrade, thereby creatingan exceedingly dangerous condition, which, if permitted to continue in existence, 'makes travel over the pave-- ment .at high, speeds hazardous.

With the apparatus forming the embodiment of the present invention the sunken portion of the roadway may be quickly and readily ele- '30 vated to 'its proper position in alignment with the adjacent portions, and thisat a considerably less cost' than is entailed in the repair by any of the various means heretofore employed. It is to be understood in the beginning, however, that the use of the apparatus is not to be confined to this road repair work, as there are many other uses to -which the apparatus. is equally well adapted, as will hereinafter more fully appear. I

In carrying out the process described in the aforementioned copending application, a mix- ,ture of soil, cement and water in the desired proportions is made to form afipressure fluid which is. forced by suitable pumping mechanism to the point desired. By drilling holes through the sunken pavement of a roadway at various intervals, the location of which depends upon the location of cracks and other condi-' tions, the pressure fluid may be forced beneath successively, thereby filing up the voids in the subgrade and efifecting a raising of the pavement to a proper elevation. It is to he understood that the applie cation of the pressure fluid to the slab or depressed portion of the pavement isnot to he confined to the forcing of the same through holes drilled therein, but may be applied to the 4 slab in various other Ways. Suitable cuts may also be made in the slab to permit of expansion of the same due to the raising action,

It isflalso to be understood that the invention is not confined to theutilization of the apparaus solely for the purpose of. raising or shifting various objects as it may also be employed as a subgrade filler to fill cavities or voids in the subgrade; in which event it constitutes a preventative. By filling the voids before the pavement or other structure settles, settlement is prevented.

It is an object of the invention-to provide a mobile apparatuswhich serves both as a mixing device for mixing the pressure material, and as a pumping device for delivering the mixed'material to the desired point and buildingup the required pressure. I

Another object of the invention is to provide a unitary frame structure which forms the mixing chamber, support for a power plant or unit, housing for a power take-01f, and traction wheel support, thereby eliminating the necessity of a separate chassis or subfranie.

I A further object of the invention is to prevent passage of the pressure materials to the pumping mechanism before the said' materials become thoroughly mixed.

A still further object is to providea simple and ready control for varying the consistency or fluidity of the pressure materials.

Other and further objects and advantages of the invention will be hereinafter set forth and ,90 the novel features thereof defined by the appended claims. X

In the drawings,

Figure 1 is a perspective view of the appa ratus as usedfor raising a sunken portion of pavement,

Figure 2 is a longitudinal sectional view of the apparatus, the forward portion thereof being shown in elevation,

Figure 3 is a sectional view taken approximately on the line 33 of Figure 2,

Figure 4 is a bottom plan view,

Figure 5 is a perspective view of the unitary frame structure,

Figure 6 is a fragmentary detail viewshowing the water pump circulating system, and con trol therefor, and I Figure Z is an end View of the parts shown in Figure t.

Like reference characters designate corresber 3 constituting a temporary storage chamher; The mixing chambers are separated by a bafiie 4 which extends upwardly from the bottom of the chambers less than the full height of the said chambers. At one end of the mixing chamber 2' is a hopper 5 into which the materials to be mixed are placed for entrance into the mixing chambers. Extending forwardly of the mixing chambers, in spaced relation to each other are the longitudinal beam members 6 which constitute the support for the power plant or motor unit generally denoted by the reference character 7. Below the mixing chambers and at the rear of the longitudinally extending members 6 is formed a power take-off or gear housing 8 to which is connected a brace member 9 for supporting the rearward end of the mixing chamber 2. A housing 10 extends transversely of the frame member in which the rear axle is positioned. Add the foregoing parts are preferably welded together to provide a rigid unitary structure which eliminates the use of a separate chassis or subframe for supporting the various chambers.

Suspended from the chamber 3 inany suitable. manner are the cylinders 11 and 12, said cylinders being preferably provided with removable heads 13 and 14 which may be secured in position by the tie rods 15 and 16. Located within the cylinders are pistons 1'7 and 18 each of which includes a head having a longitudinal bore or passagethrough the same, the heads being slidably mounted on piston rods 19 and 20. Fixedly secured to the ends of the rods are, valves or plug members 21 and 22 having tapered faces 23 and 24 adapted to engage the seats 25 and 26 formed in the heads. Positioned intermediate the valves 21 and 22 and the bails 2'7 and 28 for the piston heads are suitable cushioning springs 29 and 30 toabsorb the shocks incident to the longitudinal displacement of the valves with respect to the heads on the return strokes.

Pivotally connected to the piston rodsat their upper ends are walking beams 31 and 32 which are in turn pivotally connected-at their opposite ends to the mixing chamber 2. Connecting rods 33 and 34 are pivotally connected to the walking beams intermediate the ends thereof,

said connecting rods being journalled on a suitable crank shaft 35, having a one hundred and eighty degree throw.

Positioned within the mixing receptacle 2 are suitable agitating or mixing instrumentalities in the form of radially extending paddles or,

blades 36 mounted on a shaft 38 extending lon itudinally of the chamber. It is also preferable to provide the auxiliary or temporary storage chamber 3 with one or more blades as at 3'1 to keep the materials mixed until they are passed to the cylinders 11 and 12 which constitute the pressure chambers. The blades are so arranged as to pass the materials being mixed longitudinally of the chambers, thereby causing the mixed materials to assume a greater depth at the end of the chamber opopsite to the material receiving end. The bafile 4 prevents passage of the. materials to the chamber 3- and cylinders before they have become thoroughly mixed, it

being necessary for the materials to flow up conventional type, being preferably provided" with a clutch control 41 to permit interruption of the power at will. Suitable pulleys, 42 on the end of the power shaft 43, and 44 on the end of shaft 38 are provided, being connected together by belt 45. The crank shaft is driven from the shaft 38 through a sprocket and chain connection 46, shaft 4'7 andworm gears 48. In the event clogging occurs in the pumping mechanism or the mixing instrumentalities become wedged, no harm will result since the belt45 will slip and for this reason, it has an advantage over a positive drive.

Extending from the cylinders .or pressure chambers 11 and 12 are discharge connections 49 and 50 in which are located suitable checkvalves 51. The connections are joined by a pipe 52 to providea common discharge connection to which a preferably flexible conduit 53 is connected, such as a length of heavy hose. The end of this conduit is provided with an elbow 54 to which an expansible and flexible nozzle 53" is attached. By inserting the nozzle into an aperture drilled in the pavement, the pressure exerted by the pump apparatus expands the nozzle within the aperture to maintain the same in position without furtheradditional securing oranchoring means. I

For the purpose of controlling the consistency or fluidity of the pressure materials, the apparatus is preferably provided with a water pump as shown at 55 having a preferably flexible intake conduit 56 which maybe lead to the Water supply. The water is forced from the pump through pipe 57 and discharged from the spout 58 into the mixing chamber 2, a control valve 59 being provided to control the discharge. A by-pass 60 extends between the intake and discharge pipes for the purpose of continuously by-passing the water through the pump when the control valve 59 is closed, thereby avoiding the necessity of stopping the pump when sufficient water has been discharged into the mix; ing chamber. is positioned in the by-pass connection for the purpose of preventing flow through the by-pass when the control valve 59 is open, the valve 61 opening by the back pressure when valve 59 is closed. The pump may be driven from the shaft 38 through pulley 62 belt63 pulley 64 and shaft 65.

The operation 'of the apparatus should be apparent from the foregoing and may be briefly described as follows:

The holes having been bored to receive the nozzle, the same is positioned therein and the A suitable automatic va1ve"'61'.-

apparatus placed in operation by means of the clutch control 41. The materials to be mixed are dumped or shoveled through the hopper 5 into the: mixing chamber 2, a suitable quantity of water being addedby manipulating the conplace.

in said head, a piston rod on which said head is slidably mounted, said rod havinga valve fixedly secured to the end thereof for cooperation with the seat in said head to close'the passage the piston heads by virtue of the slidable con-' nection between the piston rods and the heads, and the mixed materials are passed from the chamber 3 through the pistons into the cylinders or pressure chambers. The piston valves are positively closed on the down-strokes and the materials in advance of the cylinders are placed under compression and forced through the check valves in the discharge connections to flow evenly through the conduit 53 and discharge nozzle 53'. When the desired quantity of pressure material has been discharged, the apparatus may be stopped and the nozzle transferred to another position as is more fully described in the co:

pending application. Suitable draft connections, generally designated 66 are preferably provided for the purpose of moving the apparatus from place to' The forward end of the machine is also preferably yieldablysupported by suitable springs 67 positioned intermediate the front axle 68 and the abutments 69 formed on the longitudinal power unit supports. 7

To permit reciprocation of the pistons by the crank shaft through the medium of the walking beams, the chamber 3 is slotted or notched as at 70 and 71 to afiord'free up and down movement of the walking beams.

While the specific details of construction have been herein shown and described. *the invent ion is not confined thereto as changes and alterations may be made without departing from the spirit thereof as defined by the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: 1. In an apparatus of the class described, a mixing chamber, mixing instrumentalities therein, a presssure chamber for receiving mixed materials from said mixing chamber, a reciprocable piston in said. pressure chamber for said mixed materials, a temporary storage chamber inter-' mediate said mixing and pressure chambers, mixing instrumentalities in said storage chamber, driving means for operating said mixing instrumentalities and reciprocating said piston, and means communicating with said pressure chamber for directing the mixed material to a desired point crete slab or the like, said piston and driving means constituting a pressure system serving to impart a pressure to said mixed materials in an amount sufflcient to create a lifting action on said slab.

2. In an apparatus of the class described, a mixing chamber for receiving the materials to be mixed, mixing instrumentalities therein, a

1 pressure chamber,.a reciprocable piston in said from said mixing chamber,

pressure chamber, means for transferring the mixed materials .from the mixing chamber though the piston to the pressure chamber, means communicating with said pressure chamber for placing the transferred materials under pressure for. delivery at a desired point, and means for actuating said mixing instrumentalities and said piston.

3. In' an apparatus of the class described, a mixing chamber for receiving the materials to be mixed, 'mixing instrumentalities arranged therein, a pressure chamber associated with said mixing chamber for receiving mixed materials v a piston in said pressure chamber including a head having a longitudinal passage therethrough, a. valve seat valve being adapted to be of emplacement beneatha conin an aperture,

through the head on the pressure stroke, said withdrawn from en gagement with the seat on the return stroke to open the passage through the piston, means for cushioning the withdrawal movement of the valve with respect to the head, a walking beam pivotally secured to the mixing chamber at one end and having a pivotal connection with the piston rod at the other end, a crank shaft, driving means for said crank shaft, and 2. connecting rod having one end connected to said crank shaft and being connected at the opposite end to the walking beam at a point intermediate the ends of the latter, said materials in said chamber being transferred to said pressure chamber incident to reciprocation of said piston for delivery under pressure at a desired point.

4. In an apparatus of the class described, a mixing chamber for receiving the materials at one end thereof to' be mixed, instrumentalities disposed in said mixing chamber for mixing the materials, said instrumentalities being adapted to pass the materials longitudinally of the mixing chamber, a temporary storage chamber at the opposite end of the mixing chamber and separated therefrom by a balile of less height than the heightof said mixing chamber, said baflie constituting means for preventing the passage of unmixed materials to the storage chamber, a pressure chamber communicating with said storage chamber, a piston in said pressure chamber, means in said piston for interrupting the communication between said pressure and storage chambers incident to reciprocation of said piston, said materials being transferred from said storage chamber to said pressure chamber incident to reciprocation of the piston, driving means for said mixing insinumentalities and piston, and means for conducting said materials under pressure from said pressure chamber to a desired point,

5. In an apparatus of the class described, a mixing chamber, mixing instrumentalitiestherein, a temporary storage chamber separated from said mixing'chamber by a baflie member of less height than said mixing chamber, a. pressure chamber communicating with said storage chamber, a reciprocable piston in said pressure chamber, a valve in said piston adapted to be closed on the pressure stroke of the piston to age and pressure chambers, a discharge connection for said pressure chamber, a check valve in said connection, a flexible conduit .secured to said connection and including an expansible nozzle secured to the free the expansion of said nozzle by the pressure in the conduit and pressure chamber constituting the means for maintaining said nozzle in the aperture, a water pump associated 1 interrupt the communication between said storend thereof for insertion with the mixing chamber, said water pump hav- 1;;

ing a flexible intake conduit and a discharge conduit for efl'ecting discharge in said mixing chamber, a control valve in said discharge conduit, 8. by-pass connection between said intake and discharge conduits, an automatic valve in said by-pass connection adapted to. be normally closed when said control valve is open and to be opened by the back pressure whenthe control valve is closed, and drive mechanism for said water pum'p,

mixing and mixing chamber. spaced powerthe class described, including a trough-shaped mixing chamber having a transversely extending storage chamber at one end thereof and a chamber-separating partition extending less than the full height of said mixing chamber, spaced power plant supporting members extending longitudinally Irom said chambers, a. power take-off housing beneath said chambers, and a brace member extending 'from said housing to the mixing chamber adjacent to the free end thereof.

JOHN W. POUL' IER.

CERTIFICATE or CORRECTION.

' Mn No. 1,969,324.

August 7, 1934.

JOHN w. POULTER.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as :follows':

the words "for said mixed materials" claim 1, strike out after "'chamher'f in line 43; and line 62,. claim 2, for

should be read with these co that the said Letters Patent Page 3, lines 42 and 43,

" though" *samemay conform to the record of the case in the Patent Office. sealed this 11th day of September, A. D. 1934.

Leslie Frazer Acting Commissioner of Patents.

and insert the same; read through; and rrections therein that the d mixing chamber. spaced powerthe class described, including a trough-shaped mixing chamber having a transversely extending storage chamber at one end thereof and a chamber-separating partition extending less than the full height of said mixing chamber, spaced power plant supporting members extending longitudinally Irom said chambers, a. power take-off housing beneath said chambers, and a brace member extending 'from said housing to the mixing chamber adjacent to the free end thereof.

JOHN W. POUL' IER.

CERTIFICATE or CORRECTION.

' Mn No. 1,969,324.

August 7, 1934.

JOHN w. POULTER.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as :follows':

the words "for said mixed materials" claim 1, strike out after "'chamher'f in line 43; and line 62,. claim 2, for

should be read with these co that the said Letters Patent Page 3, lines 42 and 43,

" though" *samemay conform to the record of the case in the Patent Office. sealed this 11th day of September, A. D. 1934.

Leslie Frazer Acting Commissioner of Patents.

and insert the same; read through; and rrections therein that the d 

